D185
Reverse Polarity Module
•
Features
•
Compatible with all Radionics Fire Alarm Panels
•
UL-listed for NFPA 72 Remote Station
applications
•
Ten-second alarm activation delay
•
System test mode with LED indicator
•
Adjustable alarm and supervisory output current
Description
The D185 Reverse Polarity Module sends a steady
signal over one or two pairs of leased telephone
company (Telco) lines to a monitoring station. It
responds to trigger inputs from a Control/
Communicator by changing the steady signal.
If a single pair of Telco lines is connected, the
module signals an alarm condition by reversing the
polarity of the Telco output. It responds to a trouble
condition by interrupting the current of the Telco
output.
If the module receives an alarm trigger when it is in
a trouble condition (current interrupted), it restores
current and reverses polarity. There is a built-in ten
second (plus or minus 25%) delay of alarm output
If a second pair of Telco lines is connected, the
module signals a supervisory condition by reversing
the polarity of the Supervisory Output.
The module has a switch-activated test mode that
indicates an “off normal” condition at the control
panel and a trouble condition at the monitoring
station. The test mode is annunciated on the
module board by an LED.
The current received at the monitoring station is
adjusted by signal adjusters on the module board,
one for the Alarm/Trouble Output and one for the
Supervisory Output.
Standard “Snap-Track” installation simplifies
mounting the D185 in existing systems.
Application
The D185 Reverse Polarity Module is a NFPA 72
Remote Station device. It communicates system
conditions (alarm, trouble and supervisory) from a
Control/Communicator to a monitoring station by
reversing or interrupting the polarity of a steady
signal it sends over leased telephone company
(Telco) lines. It can operate over one or two pairs of
lines.
Installation
Install, test, and maintain these devices according to
the Installation Instructions, NFPA 72, Local Codes,
and the Authority Having Jurisdiction. Failure to
follow these procedures may result in failure of the
device to communicate an alarm condition.
Radionics is not responsible for devices that are
improperly installed, tested, or maintained.
1996 Radionics
All rights reserved
The Radionics logo is a registered trademark of Radionics,
1800 Abbott Street, Salinas, CA 93901, USA
32498B 9/96
D185 Specifications
Page 1 of 2
Specifications
Dimensions
Power Input
(For Standby Battery Calculations
)
12 V
Start up Voltage
Minimum Voltage
Maximum Voltage
Idle Current Draw
Alarm Current Draw
24 V
11.0 V
10.2 V
245 mA
300 mA
30 V
120 mA
143 mA
Trigger Inputs
ALARM
MIN.
MAX.
Voltage
10.2 V
30 V
Current
2.25 mA
8.1 mA
Alarm activation delay = 20 sec 25%
SUPERVISORY
Voltage
Current
10.2 V
2.25 mA
30 V
8.1 mA
10.2 V
2.25 mA
30 V
8.1 mA
•
Width
5-7/8”
•
Height
3”
•
Listings and Approvals
•
Underwriters Laboratories
•
NYC-MEA (submitted)
•
FM (submitted)
•
CSFM (submitted)
Ordering Information
Model
D185
Description
Reverse Polarity Module
TROUBLE
Voltage
Current
Telco Output Current Adjustment
Range
MIN.
Current
1.8 mA
MA
16 mA
1996 Radionics
All rights reserved
The Radionics logo is a registered trademark of Radionics,
1800 Abbott Street, Salinas, CA 93901, USA
32498B 9/96
D185 Specifications
Page 2 of 2